Malicious PDF — malware analysis report

Static analysis result for SHA-256 734799270085bf99…

MALICIOUS

PDF

75.6 KB Created: 2021-03-09 22:57:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e7b97a205d1f0a97d0acf1ac90fc608f SHA-1: 9bfce6198427b83b50ebbf12c01503b50667d592 SHA-256: 734799270085bf995f97cb10012497dc0ad3b4dcaeeaf1a4037c627df5e8fecf
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses brand-impersonation credential phishing. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://tasimaxexakopox.weebly.com/uploads/1/3/2/6/132681882/fegeg_webivawoladiru.pdf.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://maypoin.ru/wix?keyword=nikon+slughunter+shotgun+scope PDF link annotation
    • https://tasimaxexakopox.weebly.com/uploads/1/3/2/6/132681882/fegeg_webivawoladiru.pdfIn PDF document text
    • http://1fps.ru/dogixisiveragezaloxok0gra.pdfIn PDF document text
    • http://sovuradema.medianewsonline.com/online_booking_software_ratings.pdfIn PDF document text
    • http://zokugorevat.mywebcommunity.org/dewalt_d55146_compressor_regulator.pdfIn PDF document text
    • http://biomaniix.website/didevokudezurudyisb.pdfIn PDF document text
    • http://freud.icu/fetiwemudib1slni.pdfIn PDF document text
    • http://arthromedro.xyz/we_were_liars_summary_plot1xj4y.pdfIn PDF document text
    • https://cdn.sqhk.co/poronujefino/07mgcjf/defender_razor_blade_review.pdfIn PDF document text
    • https://lurotafimeka.weebly.com/uploads/1/3/0/7/130740015/6695524.pdfIn PDF document text
    • http://kefijor.mygamesonline.org/how_do_you_make_a_d_and_d_character.pdfIn PDF document text
    • https://cdn.sqhk.co/dasisogi/IMtgiha/33383178184.pdfIn PDF document text
    • http://nuverlites.online/17544357946vpf8s.pdfIn PDF document text
    • https://wavoxodasamemat.weebly.com/uploads/1/3/5/3/135348105/6c8118.pdfIn PDF document text
    • https://pabedowilopore.weebly.com/uploads/1/3/1/1/131163579/zuletawugojowi.pdfIn PDF document text
    • http://hopecommunitynaz.com/application_format_in_english_for_bonafide_certificatejv1lp.pdfIn PDF document text
    • http://bella24.xyz/petta_audio_songs_comemhpn2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bufexa/que_es_la_musica_libro.pdfIn PDF document text
    • http://vipuzala.myartsonline.com/arduino_projects_book_170_pages.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/founders_at_work_review.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/new_whatsapp_status_malayalam.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCA 5020 bytes
SHA-256: ea1cdf50de0e2f3f2817af9e7b9122949d891c652daf8499386972376429d7f6
font_01_sfnt_off0000fce8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE8 10476 bytes
SHA-256: c787ae2dbd6c415589f7f2539e7c3f06071c95179b4bfe4e145c6bdb0294a00b

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